SIT1552AI-JE-DCC-32.768E

SiT1552 Smallest (1.2mm2), Smallest (1.2mm2), Ultra-Low Power, 32.768 kHz MEMS TCXO Smallest (1.2mm2), Ultra-Low Power, 32.768 kHz MEMS TCXO Features Applications         32.768 kHz ±5, ±10, ±20 ppm frequency stability options over temp World’s smallest TCXO in a 1.5 x 0.8 mm CSP Operating temperature ranges:  0°C to +70°C  -40°C to +85°C Ultra-low power: 3.63V, or lower operating frequency below 32 kHz. When measuring the SiT1552 output frequency with a frequency counter, it is important to make sure the counter's gate time is >100 ms. The slow frequency of a 32kHz clock will give false readings with faster gate times. Rev 1.31 Page 4 of 11 www.sitime.com SiT1552 2 Smallest (1.2mm ), Ultra-Low Power, 32.768 kHz MEMS TCXO Calculating Load Current No Load Supply Current Total Supply Current with Load When calculating no-load power for the SIT1552, the core and output driver components need to be added. Since the output voltage swing can be programmed to minimize load current, the output driver current is variable. Therefore, noload operating supply current is broken into two sections; core and output driver. The equation is as follows: To calculate the total supply current, including the load, follow the equation listed below. Total Current = Idd Core + Idd Output Driver + Load Current Example 1: Full-swing LVCMOS Total Supply Current (no load) = Idd Core + Idd Output Driver  Vdd = 1.8V Example 1: Full-swing LVCMOS  Idd Core = 990n  Vdd = 1.8V  Load Capacitance = 10pF  Idd Core = 990nA (typ)  Idd Output Driver: (Cdriver)(Vout)(Fout) =  Voutpp = 1.8V  Idd Output Driver: (Cdriver)(Vout)(Fout) = (3.5pF)(1.8V)(32768Hz) = 206nA  (3.5pF)(1.8V)(32768Hz) = 206nA  Load Current: (10pF)(1.8V)(32768Hz) = 590nA  Total Current = 990nA + 206nA + 590nA = 1.79µA Supply Current = 990nA + 206nA = 1.2µA Rev 1.31 Page 5 of 11 www.sitime.com SiT1552 2 Smallest (1.2mm ), Ultra-Low Power, 32.768 kHz MEMS TCXO Typical Operating Curves Frequency Stability (PPM) (TA = 25°C, Vdd = 1.8V, unless otherwise stated) Pre-reflow 5 ppm Option (E) 200 units Post 3x-reflow 5 ppm Option (E) 200 units Temperature (°C) Figure 4. Frequency Stability Over Temperature (Post-Reflow) Output Stage Current (nA/Vpp) Figure 3. Frequency Stability Over Temperature (Pre-Reflow) Vdd = 3.63V Vdd = 1.5 – 1.8V Vdd = 3.63V Vdd = 1.5 – 1.8V Temperature (°C) No Load Current (µA) Figure 5. Core Current Over Temperature Figure 6. Output Stage Current Over Temperature Vdd = 3.63V (6µA) Vdd = 1.5 – 1.8V 0.99 Time from Power ON [ms] Temperature (°C) Figure 7. Total Supply Current Over Temperature, LVCMOS (Core + LVCMOS Output Driver, No Load) Rev 1.31 Page 6 of 11 Figure 8. Start-up and Steady-State Current Profile www.sitime.com 2 Smallest (1.2mm ), Ultra-Low Power, 32.768 kHz MEMS TCXO Frequency Error (ppm) SiT1552 Noise Injection Frequency (Hz) Figure 9. Power Supply Noise Rejection (±150mV Noise) Figure 10. Temperature Ramp Response Figure 11. LVCMOS Output Waveform (Vswing = 1.8V, SIT1552AI-JE-DCC-32.768, 10 pF Load) Rev 1.31 Page 7 of 11 www.sitime.com SiT1552 2 Smallest (1.2mm ), Ultra-Low Power, 32.768 kHz MEMS TCXO Dimensions and Patterns Package Size – Dimensions (Unit: mm) Recommended Landing Pattern (Unit: mm) 1.54 ±0.02 #4 #3 0.84 ±0.02 1.55 x 0.85 mm CSP #3 #4 #4 #3 0.315 ±0.015 #1 #2 #2 #1 #1 #2 (soldermask openings shown with dashed line around NSMD pad) Recommend 4-mil (0.1mm) stencil thickness Rev 1.31 Page 8 of 11 www.sitime.com SiT1552 2 Smallest (1.2mm ), Ultra-Low Power, 32.768 kHz MEMS TCXO Manufacturing Guidelines 1) No Ultrasonic Cleaning: Do not subject the SiT1552 to an ultrasonic cleaning environment. Permanent damage or long term reliability issues to the MEMS structure may occur. 2) Do not apply underfill to the SiT1552. The device will not meet the frequency stability specification if underfill is applied. 3) Reflow profile, per JESD22-A113D. 4) For additional manufacturing guidelines and marking/tape-reel instructions, refer to: SiTime Manufacturing Notes. Rev 1.31 Page 9 of 11 www.sitime.com SiT1552 2 Smallest (1.2mm ), Ultra-Low Power, 32.768 kHz MEMS TCXO Ordering Information Part number characters in blue represent the customer specific options. The other characters in the part number are fixed. SiT1552AI-JE-DCC-32.768S Part Family Packaging “SiT1552” “S”: 8 mm Tape & Reel, 10ku reel “D”: 8 mm Tape & Reel, 3ku reel “E”: 8 mm Tape & Reel, 1ku reel Revision Letter “A”: is the revision Blank for Bulk Samples in cut Tape & Reel strips Temperature Range Output Clock Frequency (kHz) “C”: Commercial, 0 to 70ºC 32.768 kHz “I”: Industrial, -40 to 85ºC Package Size “J”: 1.5 mm x 0.8 mm CSP Over Temperature Stability Options “E”: ±5 ppm “F”: ±10 ppm “1”: ±20 ppm LVCMOS Output Rev 1.31 Page 10 of 11 www.sitime.com SiT1552 2 Smallest (1.2mm ), Ultra-Low Power, 32.768 kHz MEMS TCXO Table 4. Revision History Version Release Date 1.0 09/17/2014 Change Summary Rev 0.9 Preliminary to Rev 1.0 Production Release Updated start-up time specification Added typical operating plots Removed SOT23 and 2012 SMD package options Added “no underfill” in frequency stability specification condition Added Manufacturing Guidelines section 1.1 10/14/2014 Improved Start-up Time at Power-up spec Added 5 pF LVCMOS rise/fall time spec 1.2 11/10/2014 Updated 5 pF LVCMOS rise/fall time spec 1.3 11/12/2015 Removed NanoDrive from EC Table and Ordering Info Updated logo and company address 1.31 01/18/2018 Updated SPL, page layout changes SiTime Corporation, 5451 Patrick Henry Drive, Santa Clara, CA 95054, USA | Phone: +1-408-328-4400 | Fax: +1-408-328-4439 © SiTime Corporation 2014-2018. The information contained herein is subject to change at any time without notice. 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CRITICAL USE EXCLUSION POLICY BUYER AGREES NOT TO USE SITIME'S PRODUCTS FOR ANY APPLICATION OR IN ANY COMPONENTS USED IN LIFE SUPPORT DEVICES OR TO OPERATE NUCLEAR FACILITIES OR FOR USE IN OTHER MISSION-CRITICAL APPLICATIONS OR COMPONENTS WHERE HUMAN LIFE OR PROPERTY MAY BE AT STAKE. SiTime owns all rights, title and interest to the intellectual property related to SiTime's products, including any software, firmware, copyright, patent, or trademark. The sale of SiTime products does not convey or imply any license under patent or other rights. SiTime retains the copyright and trademark rights in all documents, catalogs and plans supplied pursuant to or ancillary to the sale of products or services by SiTime. Unless otherwise agreed to in writing by SiTime, any reproduction, modification, translation, compilation, or representation of this material shall be strictly prohibited. Rev 1.31 Page 11 of 11 www.sitime.com